EP0209609A1 - Double endless belt-shaping apparatus - Google Patents

Double endless belt-shaping apparatus Download PDF

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Publication number
EP0209609A1
EP0209609A1 EP85108944A EP85108944A EP0209609A1 EP 0209609 A1 EP0209609 A1 EP 0209609A1 EP 85108944 A EP85108944 A EP 85108944A EP 85108944 A EP85108944 A EP 85108944A EP 0209609 A1 EP0209609 A1 EP 0209609A1
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EP
European Patent Office
Prior art keywords
belts
motors
machine according
belt
belt sections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85108944A
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German (de)
French (fr)
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EP0209609B1 (en
Inventor
Herbert Prignitz
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to DE8585108944T priority Critical patent/DE3570620D1/en
Priority to EP85108944A priority patent/EP0209609B1/en
Priority to AT85108944T priority patent/ATE43533T1/en
Priority to FI862914A priority patent/FI862914A/en
Priority to DD86292519A priority patent/DD259171A5/en
Priority to CS865401A priority patent/CS261897B2/en
Priority to NO862872A priority patent/NO862872L/en
Priority to HU862939A priority patent/HUT42991A/en
Priority to CN86104919.5A priority patent/CN1005396B/en
Publication of EP0209609A1 publication Critical patent/EP0209609A1/en
Publication of EP0209609B1 publication Critical patent/EP0209609B1/en
Application granted granted Critical
Priority to US07/455,841 priority patent/US4981427A/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/14—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
    • B29C39/16—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length between endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/30—Expanding the moulding material between endless belts or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/60—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/48—Endless belts
    • B29C2043/483—Endless belts cooperating with a second endless belt, i.e. double band presses

Definitions

  • the invention relates to a double belt molding machine for the production of foam plastic sheets as a continuous strand.
  • the machine has two endless conveyor belts rotating in opposite directions. These can be belts or steel belts, for example, which are guided over a drive roller, slideways serving as support elements and around a deflection roller.
  • the conveyor belts can also be plate belts which are guided over drive and deflection sprockets and are provided with support rollers which can run along support elements in the form of running rails.
  • the two opposite, parallel and in the same direction running sections of the two bands limit the space used to form the continuous foam plastic strand on its two flat sides.
  • the two narrow sides of this room can be delimited by side belts which also run around or by fixed side rails, the position of which is adjustable.
  • slip can occur when the torque is transmitted from the drive drums to belts or steel belts by friction.
  • different deviations in the diameter of the drive drums as a result of contamination or wear are possible.
  • Contamination of the support plates of the conveyor belts can also influence the tensile forces.
  • the weight of the band sections delimiting the top and bottom of the molding channel and the weight of the materials introduced into the channel, in particular the foam material and its laminations and supports stress the bottom band section and its support plate, which results in an increase in the tensile force in the bottom band while on the other hand the force of the mixture foaming in the molding channel loads both the lower and the upper band section. All the causes disturbing the equality of the tensile forces in the active belt sections require immediate compensation.
  • the invention solves the problem of creating a double-belt molding machine of the type mentioned in the introduction, in which the creation of harmful shear forces within the foam strand in the molding channel is avoided with the simplest possible means.
  • the lower endless conveyor belt is designated 10 and the upper one with 20.
  • Each of these conveyor belts is guided by a drive roller 11 or 21.
  • the drive rollers are each directly coupled to an electric individual drive motor 12, 22, from which they can be driven in the opposite direction of rotation, as indicated by the direction of the arrow.
  • the directly opposite belt sections are via plate-shaped support elements 13, 23, which form slideways, and via deflection rollers 14, 24 and rollers 15, 16 and 25, 26 out.
  • the deflection rollers or the rollers can also be designed as tension rollers for the belts 10, 20.
  • the space 30 between the sections of the belts 10, 20 supported by the support elements 13, 23 serves to form the continuous foam plastic strand, which can be divided into the desired length after leaving the machine for producing foam plastic sheets.
  • This channel-shaped space is delimited on its two flat sides by the active sections of the bands 10, 20.
  • the two narrow sides of this shaped channel can be closed by (not shown) delimitations in the form of circumferential side bands or fixed adjustable side rails.
  • the foamable plastic mixture is introduced into the molding channel 30 at one end of the machine, as indicated by an arrow on the left in FIG. 1, fills its cross-section during foaming and solidifies during its passage.
  • adjusting devices 28 with a lifting spindle or the like can be spaced apart from one another. be arranged on both sides of the molding channel. These serve to evenly change the distance of the upper band 20 together with the associated support plates 23 and all other drive and guide devices belonging to it from the lower band 10, in order to thereby adjust the height of the molding channel 30 and thus the thickness of the foam plastic plates to be produced can.
  • 2 and 3 which show the machine as seen in the direction of tape travel, are two different heights of the upper tape with those belonging to it Parts compared to the lower band and the parts belonging to it illustrated. In Fig. 2, the height of the molding channel 30 is greater than in Fig. 3.
  • the drive rollers 11, 21 are provided with individual drive motors 12, 22, it is possible for the upper belt 20 with all its drive and guide parts as one together to form liftable unit 28 by means of the lifting devices, without the need for cumbersome adjustable transmissions between the drive rollers of the two belts and a drive motor common to them, and there are also no differences in the speed of the upper and lower belts when the tractive force changes.
  • Regulation of the individual drive motors of the two belts for synchronism or for equal tensile forces in the two belts can be carried out with relatively simple means, for example when using AC or three-phase motors which can be regulated by frequency changes.
  • the control for synchronism can take place depending on changes in the torque or the current consumption of the motors or instead depending on the running speed of the belt sections.
  • the possibilities for forming a double belt forming machine according to the invention are not limited to the exemplary embodiment described above.
  • direct current motors e.g. DC shunt motors, DC main shunt motors or DC double-circuit motors to use.

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Belt Conveyors (AREA)
  • Saccharide Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Package Frames And Binding Bands (AREA)
  • Braking Arrangements (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Paper (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)

Abstract

1. Double endless belt-shaping apparatus for the manufacture of foamed plastic boards in the form of a continuous strand with two endless conveyor belts rotating in opposite directions which are conducted via a driving roller (or driving chain wheels in the case of plate conveyors) and a deflection roller, in which two opposite belt sections running parallely and in the same direction, delimit the space serving to shape the continuous foamed plastic strand, the conveyor belts being individually drivable, characterized by the following features : a) the conveyor belts (10, 20) are constructed as belts, steel belts or plate belts ; b) the opposite sections of the belts (10, 20) located within the area where the continuous foamed plastic, strand is shaped are supported by supporting members (13, 23) ; c) the driving rollers (or driving chain wheels in the case of plate conveyors (11, 21) of the two conveyor belts (10, 20) are provided with electrical single driving means (12, 22) adjusted to synchronism of the opposite belt sections, the adjustment of the single driving motors to synchronism of the belt sections being effected as a function of the speed of the belt sections, and d) the upper conveyor belt, together with the appropriate carrying and supporting members (13, 23) and the single driving motor (22) appertaining thereto, is disposed so as to be vertically adjustable with the aid of adjustment means (28).

Description

Die Erfindung bezieht sich auf eine Doppelband-Form­maschine für die Herstellung von Schaumkunststoff­platten als fortlaufender Strang. Die Maschine weist zwei mit entgegengesetztem Drehsinn umlaufende end­lose Transportbänder auf. Diese können beispiels­weise Gurte oder Stahlbänder sein, welche über eine Antriebsrolle, als Stützelemente dienende Gleitbahnen und um eine Umlenkrolle geführt sind. Die Transport­bänder können auch Plattenbänder sein, die über An­triebs- und Umlenkkettenräder geführt und mit Stütz­rollen versehen sind, die an Stützelementen in Form von Laufschienen entlanglaufen können. Die beiden sich gegenüberliegenden, parallel und in gleicher Richtung laufenden Abschnitte der beiden Bänder begrenzen den zur Formung des fortlaufenden Schaum­kunststoffstranges dienenden Raum an seinen beiden Flachseiten. Die beiden Schmalseiten dieses Raumes können durch ebenfalls umlaufende Seitenbänder oder durch feststehende Seitenschienen begrenzt sein, deren Lage einstellbar ist.The invention relates to a double belt molding machine for the production of foam plastic sheets as a continuous strand. The machine has two endless conveyor belts rotating in opposite directions. These can be belts or steel belts, for example, which are guided over a drive roller, slideways serving as support elements and around a deflection roller. The conveyor belts can also be plate belts which are guided over drive and deflection sprockets and are provided with support rollers which can run along support elements in the form of running rails. The two opposite, parallel and in the same direction running sections of the two bands limit the space used to form the continuous foam plastic strand on its two flat sides. The two narrow sides of this room can be delimited by side belts which also run around or by fixed side rails, the position of which is adjustable.

Zum Antrieb der Transportbänder war bei den bisher bekannten Ausführungsformen solcher Doppelband-­Formmaschinen ein gemeinsamer, mit den Antriebs­rollen bzw. Antriebskettenrädern gekuppelter elek­trischer Antriebsmotor vorgesehen. Ein genauer Gleichlauf der aktiven, den Formungsraum begrenzen­den Bandabschnitte war damit nicht oder nur mit erheblichem Aufwand an mechanischen Einrichtungen zu erreichen. Ein Gleichlauf der Bandabschnitte ist je­doch von großer Wichtigkeit, da das Entstehen von Scherkräften in dem Schaumstoffstrang, die dessen Gefügestruktur zerreißen könnten, vermieden werden muß. Die Erfüllung dieser Forderung ist schwierig, weil der Gleichlauf der aktiven Bandabschnitte und die Gleichheit der von den Bandabschnitten auf das Material des Schaumkunststoffstranges übertragenen Zugkräfte von den verschiedensten, nicht ohne wei­teres zu beherrschenden Einflüßen abhängen. Z.B. kann bei der durch Friktion erfolgenden Übertragung des Drehmoments von den Antriebstrommeln auf Gurte oder Stahlbänder ein Schlupf auftreten. Ferner sind unterschiedliche Abweichungen des Durchmessers der Antriebstrommeln infolge Verschmutzung oder Abrieb möglich. Auch kann Verschmutzung der Stütz­platten der Transportbänder eine Beeinflussung der Zugkräfte bewirken. Ferner belasten das Gewicht der den Formkanal oben und unten begrenzenden Band­abschnitte und das Gewicht der in den Kanal einge­führten Materialien, insbesondere das Schaumstoff­material sowie dessen Kaschierungen und Auflagen, den unteren Bandabschnitt und dessen Stützplatte, was eine Erhöhung der Zugkraft in dem unteren Band zur Folge hat, während andererseits die Kraft des in dem Formkanal aufschäumenden Gemischs sowohl den unteren als auch den oberen Bandabschnitt be­lastet. Alle die Gleichheit der Zugkräfte in den aktiven Bandabschnitten störenden Ursachen er­fordern jeweils einen sofortigen Ausgleich.In the previously known embodiments of such double belt forming machines, a common electric drive motor coupled to the drive rollers or drive sprockets was provided for driving the conveyor belts. Accurate synchronization of the active belt sections that delimit the forming space was therefore not or only with to achieve considerable expenditure on mechanical devices. However, a synchronism of the band sections is of great importance, since the generation of shear forces in the foam strand, which could tear its structure, must be avoided. It is difficult to meet this requirement because the synchronism of the active band sections and the equality of the tensile forces transmitted from the band sections to the material of the foam plastic strand depend on the most varied influences which cannot be easily controlled. For example, slip can occur when the torque is transmitted from the drive drums to belts or steel belts by friction. Furthermore, different deviations in the diameter of the drive drums as a result of contamination or wear are possible. Contamination of the support plates of the conveyor belts can also influence the tensile forces. Furthermore, the weight of the band sections delimiting the top and bottom of the molding channel and the weight of the materials introduced into the channel, in particular the foam material and its laminations and supports, stress the bottom band section and its support plate, which results in an increase in the tensile force in the bottom band while on the other hand the force of the mixture foaming in the molding channel loads both the lower and the upper band section. All the causes disturbing the equality of the tensile forces in the active belt sections require immediate compensation.

Es kommt hinzu, daß eine Höhenverstellbarkeit des oberen Bandes erforderlich ist, um Schaumkunst­stoffplatten verschiedener Dicke herstellen zu können. Mittels rein mechanischer verstellbarer Kupp­lungseinrichtungen zwischen dem Antriebsmotor und den Antriebsrollen bzw. Antriebskettenrädern der Bänder ist die Verwirklichung einer solchen Höhen­verstellbarkeit äußerst schwierig.In addition, it is necessary to adjust the height of the upper band in order to produce foam plastic sheets of various thicknesses can. By means of purely mechanical adjustable coupling devices between the drive motor and the drive rollers or drive sprockets of the belts, the realization of such a height adjustability is extremely difficult.

Die Erfindung löst die Aufgabe, eine Doppelband-­Formmaschine der eingangs genannten Gattung zu schaffen, bei der mit möglichst einfachen Mitteln eine Entstehung schädlicher Scherkräfte innerhalb des Schaumstoffstranges im Formkanal vermieden ist.The invention solves the problem of creating a double-belt molding machine of the type mentioned in the introduction, in which the creation of harmful shear forces within the foam strand in the molding channel is avoided with the simplest possible means.

Zur Lösung dieser Aufgabe wird vorgeschlagen, daß bei Doppelband-Formmaschinen der eingangs ge­nannten Art die Antriebsrollen- bzw. -kettenräder der beiden Bänder mit auf Gleichlauf der sich ge­genüberliegenden Bandabschnitte geregelten elek­trischen Einzelantrieben versehen sind.To solve this problem, it is proposed that in double-belt molding machines of the type mentioned the drive roller or sprocket wheels of the two belts are provided with electric individual drives regulated to synchronize the opposite belt sections.

Bei einer solchen Doppelband-Formmaschine wird auf einfache Weise sowohl beim Anfahren als auch wäh­rend des Betriebes ein genauer Gleichlauf der aktiven, den Formkanal und damit den Schaumkunst­stoffstrang begrenzenden Bandabschnitte sowie Gleichheit der von den Bandabschnitten auf den Schaumkunststoffstrang übertragenen Zugkräfte er­reicht, so daß schädliche Scherkräfte in diesem nicht auftreten können. Umständliche und empfind­liche mechanische Kraftübertragungselemente, wie sie zur Übertragung des Drehmoments von einem ge­meinsamen Antriebsmotor aus auf die Antriebsrollen benötigt werden, sind nicht mehr erforderlich. Ein weiterer Vorteil der Erfindung besteht darin, daß die Voraussetzung für ein besonders einfaches Verändern des Abstandes der einander gegenüber ange­ordneten Bänder geschaffen ist, weil die das obere umlaufende Band tragenden Rollen oder Kettenräder zusammen mit dem Einzelantriebsmotor des oberen Bandes gemeinsam höhenverstellbar angeordnet werden können.In such a double-belt molding machine, precise synchronization of the active belt sections which delimit the molding channel and thus the foam plastic strand, as well as equality of the tensile forces transmitted from the belt sections to the foam plastic strand, is achieved in a simple manner, both when starting up and during operation, so that harmful shear forces in this cannot occur. Cumbersome and sensitive mechanical power transmission elements, such as are required to transmit the torque from a common drive motor to the drive rollers, are no longer required. Another advantage of the invention is that the prerequisite for a particularly simple Changing the distance between the belts arranged opposite one another is created because the rollers or sprockets carrying the upper circulating belt can be arranged together with the individual drive motor of the upper belt in a height-adjustable manner.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the invention are characterized in the subclaims.

Im folgenden wird der Gegenstand der Erfindung in den Zeichnungen erläutert. Es zeigt

  • Fig. 1 schematisch die Seitenansicht der wesent­lichen Teile einer Doppelband-Formmaschine gemäß der Erfindung,
  • Fig. 2, in Bandlaufrichtung gesehen, die höhen­verstellbare Anordnung der Bänder bei verhältnis­mäßig großem Abstand und
  • Fig. 3 dieselbe Anordnung bei verhältnismäßig kleinem Abstand der Bänder.
In the following the subject matter of the invention is explained in the drawings. It shows
  • 1 schematically shows the side view of the essential parts of a double belt forming machine according to the invention,
  • Fig. 2, seen in the tape running direction, the height-adjustable arrangement of the tapes at a relatively large distance and
  • Fig. 3 shows the same arrangement with a relatively small distance between the tapes.

In Fig. 1 ist das untere endlose Transportband mit 10 und das obere mit 20 bezeichnet. Jedes dieser Transportbänder ist über eine Antriebsrolle 11 bzw. 21 geführt. Die Antriebsrollen sind mit je einem elektrischen Einzelantriebsmotor 12, 22 direkt ge­kuppelt, von dem sie mit entgegengesetztem Dreh­sinn, wie durch Pfeilrichtung angedeutet, ange­trieben werden können.Die einander unmittelbar gegenüberliegenden Bandabschnitte sind über plat­tenförmige Stützelemente 13, 23, welche Gleit­bahnen bilden, sowie über Umlenkrollen 14, 24 und Laufrollen 15, 16 bzw. 25, 26 geführt. Die Um­lenkrollen oder die Laufrollen können auch als Spannrollen für die Bänder 10, 20 ausgebildet sein.In Fig. 1, the lower endless conveyor belt is designated 10 and the upper one with 20. Each of these conveyor belts is guided by a drive roller 11 or 21. The drive rollers are each directly coupled to an electric individual drive motor 12, 22, from which they can be driven in the opposite direction of rotation, as indicated by the direction of the arrow. The directly opposite belt sections are via plate-shaped support elements 13, 23, which form slideways, and via deflection rollers 14, 24 and rollers 15, 16 and 25, 26 out. The deflection rollers or the rollers can also be designed as tension rollers for the belts 10, 20.

Der Raum 30 zwischen den von den Stützelementen 13, 23 abgestützten Abschnitten der Bänder 10, 20 dient zur Formung des fortlaufenden Schaumkunststoff­stranges, der nach dem Verlassen der Maschine zur Herstellung von Schaumkunststoffplatten von der ge­wünschten Länge unterteilt werden kann. Dieser ka­nalförmige Raum wird an seinen beiden Flachseiten von den aktiven Abschnitten der Bänder 10, 20 be­grenzt. Die beiden Schmalseiten dieses Formkanals können durch (nicht dargestellte) Begrenzungen in Form ebenfalls umlaufender Seitenbänder oder fest­stehender einstellbarer Seitenschienen geschlossen sein. Das aufschäumbare Kunststoffgemisch wird am einen Ende der Maschine, wie in Fig. 1 links mit einem Pfeil angedeutet, in den Formkanal 30 ein­geführt, füllt dessen Querschnitt beim Aufschäumen aus und verfestigt sich während seines Durchlaufs.The space 30 between the sections of the belts 10, 20 supported by the support elements 13, 23 serves to form the continuous foam plastic strand, which can be divided into the desired length after leaving the machine for producing foam plastic sheets. This channel-shaped space is delimited on its two flat sides by the active sections of the bands 10, 20. The two narrow sides of this shaped channel can be closed by (not shown) delimitations in the form of circumferential side bands or fixed adjustable side rails. The foamable plastic mixture is introduced into the molding channel 30 at one end of the machine, as indicated by an arrow on the left in FIG. 1, fills its cross-section during foaming and solidifies during its passage.

Längs der Maschine können in Abständen voneinander Verstellvorrichtungen 28 mit Hubspindel od.dgl. zu beiden Seiten des Formkanals angeordnet sein. Diese dienen dazu, den Abstand des oberen Bandes 20 nebst der dazugehörigen Stützplatten 23 und aller anderen zu ihm gehörenden Antriebs- und Führungs­einrichtungen von dem unteren Band 10 gleichmäßig zu verändern, um dadurch die Höhe des Formkanals 30 und damit die Dicke der herzustellenden Schaum­kunststoffplatten einstellen zu können. In Fig. 2 und 3, welche die Maschine in Bandlaufrichtung gesehen darstellen, sind zwei verschiedene Höhen­lagen des oberen Bandes mit den zu ihm gehörenden Teilen gegenüber dem unteren Band und den zu diesem gehörenden Teilen veranschaulicht. Bei Fig. 2 ist die Höhe des Formkanals 30 größer als bei Fig. 3. Dadurch, daß die Antriebsrollen 11, 21 mit Einzel­antriebsmotoren 12, 22 versehen sind, wird es mög­lich, das obere Band 20 mit allen seinen Antriebs- und Führungsteilen als eine gemeinsam mittels der Hubvorrichtungen 28 anhebbare Einheit auszubilden, ohne daß umständliche verstellbare Transmissionen zwischen den Antriebsrollen der beiden Bänder und einem für diese gemeinsamen Antriebsmotor erfor­derlich wären, und es ergeben sich auch keine Un­gleichheiten der Geschwindigkeit des oberen und des unteren Bandes bei Änderung der Zugkraft. Eine Regelung der Einzelantriebsmotoren beider Bänder auf Gleichlauf bzw. auf Gleichheit der Zugkräfte in den beiden Bändern ist mit verhält­nismäßig einfachen Mitteln durchführbar, beispiels­weise bei Verwendung durch Frequenzänderungen re­gelbarer Wechselstrom- oder Drehstrommotoren. Die Regelung auf Gleichlauf kann in Abhängigkeit von Änderungen des Drehmoments oder der Stromauf­nahme der Motoren oder stattdessen in Abhängigkeit von der Laufgeschwindigkeit der Bandabschnitte er­folgen.Along the machine, adjusting devices 28 with a lifting spindle or the like can be spaced apart from one another. be arranged on both sides of the molding channel. These serve to evenly change the distance of the upper band 20 together with the associated support plates 23 and all other drive and guide devices belonging to it from the lower band 10, in order to thereby adjust the height of the molding channel 30 and thus the thickness of the foam plastic plates to be produced can. 2 and 3, which show the machine as seen in the direction of tape travel, are two different heights of the upper tape with those belonging to it Parts compared to the lower band and the parts belonging to it illustrated. In Fig. 2, the height of the molding channel 30 is greater than in Fig. 3. Because the drive rollers 11, 21 are provided with individual drive motors 12, 22, it is possible for the upper belt 20 with all its drive and guide parts as one together to form liftable unit 28 by means of the lifting devices, without the need for cumbersome adjustable transmissions between the drive rollers of the two belts and a drive motor common to them, and there are also no differences in the speed of the upper and lower belts when the tractive force changes. Regulation of the individual drive motors of the two belts for synchronism or for equal tensile forces in the two belts can be carried out with relatively simple means, for example when using AC or three-phase motors which can be regulated by frequency changes. The control for synchronism can take place depending on changes in the torque or the current consumption of the motors or instead depending on the running speed of the belt sections.

Die Möglichkeiten zur Ausbildung einer Doppelband-­Formmaschine gemäß der Erfindung sind jedoch nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt. So ist es insbesondere auch möglich, als elektrische Einzelantriebe Gleichstrommotoren, wie z.B. Gleichstromnebenschlußmotoren, Gleich­stromhauptschlußmotoren oder Gleichstromdoppel­schlußmotoren zu verwenden.However, the possibilities for forming a double belt forming machine according to the invention are not limited to the exemplary embodiment described above. In particular, it is also possible to use direct current motors, e.g. DC shunt motors, DC main shunt motors or DC double-circuit motors to use.

Claims (9)

1. Doppelband-Formmaschine für die Herstellung von Schaumkunststoffplatten als fortlaufender Strang mit zwei mit entgegengesetztem Drehsinn umlaufen­den endlosen Transportbändern (in Form von Gur­ten, Stahlbändern, Plattenbändern od.dgl.), die über je eine Antriebsrolle (bzw. Antriebsketten­räder bei Plattenbändern), Stützelemente (in Form von Gleitbahnen oder Rollschienen) und eine Umlenkrolle (bzw. ein Umlenkkettenrad) geführt sind, wobei die beiden sich gegenüberliegenden, parallel und in gleicher Richtung laufenden Bandabschnitte den zur Formung des fortlaufen­den Schaumkunststoffstranges dienenden Raum begrenzen, dadurch gekennzeichnet, daß die Antriebsrollen (bzw. -kettenräder) der beiden Bänder mit auf Gleichlauf der sich gegenüber­liegenden Bandabschnitte geregelten elektrischen Einzelantrieben versehen sind.1.Double belt molding machine for the production of foam plastic sheets as a continuous strand with two endless conveyor belts rotating in the opposite direction (in the form of belts, steel belts, plate belts or the like), each with a drive roller (or drive sprockets for plate belts), support elements (in the form of slideways or roller tracks) and a deflection roller (or a deflection sprocket) are guided, the two opposite, parallel and in the same direction running belt sections limit the space used to form the continuous foam plastic strand, characterized in that the drive rollers ( or sprockets) of the two belts are provided with electric individual drives regulated to synchronize the opposite belt sections. 2. Maschine nach Anspruch 1, dadurch gekennzeich­net, daß als elektrische Einzelantriebe Gleich­strommotoren vorgesehen sind.2. Machine according to claim 1, characterized in that DC motors are provided as electrical individual drives. 3. Maschine nach Anspruch 2, dadurch gekennzeich­net, daß die Gleichstrommotoren Nebenschluß­motoren sind.3. Machine according to claim 2, characterized in that the DC motors are shunt motors. 4. Maschine nach Anspurch 2, dadurch gekennzeich­net, daß die Gleichstrommotoren Hauptschluß­motoren sind.4. Machine according to claim 2, characterized in that the DC motors are main closing motors. 5. Maschine nach Anspruch 2, dadurch gekennzeich­net, daß die Gleichstrommotoren Doppelschluß­ motoren sind.5. Machine according to claim 2, characterized in that the DC motors double circuit are motors. 6. Maschine nach Anspruch 1, dadurch gekennzeich­net, daß als elektrische Einzelantriebe durch Frequenzänderungen regelbare Wechselstrom- oder Drehstrommotoren verwendet sind.6. Machine according to claim 1, characterized in that AC or three-phase motors are used as electrical individual drives by frequency changes. 7. Maschine nach Anspruch 1, dadurch gekennzeich­net, daß die Regelung der Einzelantriebsmoto­ren auf Gleichlauf der Bandabschnitte in Ab­hängigkeit von Änderungen ihres Drehmoments oder ihrer Stromaufnahme erfolgt.7. Machine according to claim 1, characterized in that the regulation of the individual drive motors on synchronism of the belt sections takes place depending on changes in their torque or their current consumption. 8. Maschine nach Anspruch 1, dadurch gekennzeich­net, daß die Regelung der Einzelantriebsmoto­ren auf Gleichlauf der Bandabschnitte in Ab­hängigkeit von der Laufgeschwindigkeit der Bandabschnitte erfolgt.8. Machine according to claim 1, characterized in that the control of the individual drive motors is carried out on the synchronism of the belt sections depending on the running speed of the belt sections. 9. Maschine nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das obere Band zusammen mit den dazugehörigen Trag- und Stützelementen und dem zu ihm gehörenden Ein­zelantriebsmotor höhenverstellbar angeordnet ist.9. Machine according to one of claims 1 to 8, characterized in that the upper band is arranged adjustable in height together with the associated support and support elements and the individual drive motor belonging to it.
EP85108944A 1985-07-17 1985-07-17 Double endless belt-shaping apparatus Expired EP0209609B1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE8585108944T DE3570620D1 (en) 1985-07-17 1985-07-17 Double endless belt-shaping apparatus
EP85108944A EP0209609B1 (en) 1985-07-17 1985-07-17 Double endless belt-shaping apparatus
AT85108944T ATE43533T1 (en) 1985-07-17 1985-07-17 DOUBLE BAND FORMING MACHINE.
FI862914A FI862914A (en) 1985-07-17 1986-07-11 DUBBELBAND-FORM MASK.
DD86292519A DD259171A5 (en) 1985-07-17 1986-07-15 DOUBLE BAND MOLDING MACHINE
NO862872A NO862872L (en) 1985-07-17 1986-07-16 Dual Band-FORE MACHINE.
CS865401A CS261897B2 (en) 1985-07-17 1986-07-16 Two-band moulding machine
HU862939A HUT42991A (en) 1985-07-17 1986-07-16 Double-belt molding machine
CN86104919.5A CN1005396B (en) 1985-07-17 1986-07-17 Double belt moulding machine
US07/455,841 US4981427A (en) 1985-07-17 1989-12-21 Double belt moulding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85108944A EP0209609B1 (en) 1985-07-17 1985-07-17 Double endless belt-shaping apparatus

Publications (2)

Publication Number Publication Date
EP0209609A1 true EP0209609A1 (en) 1987-01-28
EP0209609B1 EP0209609B1 (en) 1989-05-31

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EP85108944A Expired EP0209609B1 (en) 1985-07-17 1985-07-17 Double endless belt-shaping apparatus

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US (1) US4981427A (en)
EP (1) EP0209609B1 (en)
CN (1) CN1005396B (en)
AT (1) ATE43533T1 (en)
CS (1) CS261897B2 (en)
DD (1) DD259171A5 (en)
DE (1) DE3570620D1 (en)
FI (1) FI862914A (en)
HU (1) HUT42991A (en)
NO (1) NO862872L (en)

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EP0686470A3 (en) * 1994-06-06 1996-04-10 Nippon Catalytic Chem Ind Method for continuously forming a synthetic stone

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US8752348B2 (en) * 2005-02-25 2014-06-17 Syntheon Inc. Composite pre-formed construction articles
CA2598442C (en) * 2005-02-25 2011-02-08 Nova Chemicals Inc. Composite pre-formed building panels, a building and a framing stud
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US9033694B2 (en) 2012-02-16 2015-05-19 Sealed Air Corporation (Us) Molding apparatus and method
CN103009624A (en) * 2012-12-25 2013-04-03 如冈自动化控制技术(上海)有限公司 Double-driven crawler type heat shrinkable tube heater
CN104416692A (en) * 2013-08-22 2015-03-18 赵武敏 Belt wheel push-type machinery feeding device
CN103921434A (en) * 2014-04-11 2014-07-16 如冈自动化控制技术(上海)有限公司 Throughput type heat shrink tube heating machine
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Also Published As

Publication number Publication date
CS540186A2 (en) 1988-06-15
NO862872D0 (en) 1986-07-16
EP0209609B1 (en) 1989-05-31
CN86104919A (en) 1987-04-01
ATE43533T1 (en) 1989-06-15
US4981427A (en) 1991-01-01
DE3570620D1 (en) 1989-07-06
HUT42991A (en) 1987-09-28
DD259171A5 (en) 1988-08-17
FI862914A0 (en) 1986-07-11
CS261897B2 (en) 1989-02-10
FI862914A (en) 1987-01-18
CN1005396B (en) 1989-10-11
NO862872L (en) 1987-01-19

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